Patent US2772529A successfully refreshed from Google Patents.
US2772529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylinder block ridge grinder
Assignee: Individual
•
Filing: 1952-11-12
•
Granted: 1956-12-04
•
Expires: 1972-11-12
Abstract
No abstract record available.
Inventors
- 👤 Claude O Dutro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:23
CPC Classifications
B; B24; B24B; B24B23/00; B24B23/08
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1408578A
Cited
US386848A
Cited
DE135918C
Cited
GB190822380A
Cited
US1032193A
Cited
US1219827A
Cited
US1365149A
Cited
US1374599A
Cited
US1513604A
Cited
US1933677A
Cited
US2521210A
Cited
US2546490A
Cited
US2541412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-04 | 1960-06-04 | 1960-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-04 | 1964-06-04 | 1964-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-04 | 1968-06-04 | 1968-12-04 | $7700.00 | Window Closed / Lapsed |